WO1997037912A1 - Conveyor belt - Google Patents
Conveyor belt Download PDFInfo
- Publication number
- WO1997037912A1 WO1997037912A1 PCT/SE1997/000592 SE9700592W WO9737912A1 WO 1997037912 A1 WO1997037912 A1 WO 1997037912A1 SE 9700592 W SE9700592 W SE 9700592W WO 9737912 A1 WO9737912 A1 WO 9737912A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drum
- belt
- conveyor
- conveyor belt
- strips
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/16—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths
- B65G21/18—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths in three-dimensionally curved paths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
- B65G2207/24—Helical or spiral conveying path
Definitions
- the present invention relates to a belt conveyor comprising a drum, which is rotatably mounted on a ver ⁇ tical centre shaft, and an endless conveyor belt, which along part of its length follows a helical path through a plurality of turns around the drum and in contact with the outside of the drum.
- Belt conveyors of this type are used in e.g. freez ⁇ ing plants.
- the advancing of the conveyor belt is carried out with the aid of the drum, with the aid of means sup- porting the lowermost turn of the belt, with the aid of driving rollers outside the drum or with the aid of a combination of these.
- the belt can along the helical path be subjected to relatively high tensile stress, which may result in the belt abutting hard against the outside of the drum.
- One object of the present invention is to provide a belt conveyor of the type mentioned by way of intro ⁇ duction, which yields a reduction of the stress affect ⁇ ing the conveyor belt along the helical path.
- a further object of the invention is to permit such a reduction essentially independently of whether the con ⁇ veyor belt is supported on separate supporting rails along the helical path or is self-supporting along one or the other side.
- the drum By providing the drum with a plurality of vertical strips, which are distributed around the outside of the drum and project radially therefrom, the contact between the conveyor belt through the majority of the turns thereof and the drum is completely located in the strips.
- each strip By also making each strip vertically movable, the fric ⁇ tion in the axial direction between the drum and the con ⁇ veyor belt is reduced most significantly.
- the belt conveyor according to the invention may have a conveyor belt, which adjacent to the drum is sup ⁇ ported by a helical supporting rail, as well as a con ⁇ veyor belt, which adjacent to the drum is self-supporting and supported merely along its lowermost turn around the drum.
- the strips can advantageously constitute supporting means for the conveyor belt along the helical path and support the conveyor belt merely along the lowermost turn thereof around the drum.
- the strips can be designed to support each turn of the conveyor belt adjacent to the drum.
- the conveyor belt can at its side facing away from the drum be supported by a helical rail, which thus sup ⁇ ports each of the turns of the conveyor belt, or alterna- tively be self-supporting and be supported merely along its lowermost turn.
- Fig. 1 is a perspective view and shows an example of a belt conveyor, to which the present invention is applicable;
- Fig. 2 illustrates schematically various ways of supporting a conveyor belt around a drum;
- Fig. 3 is a schematic perspective view of a drum in a belt conveyor according to the present invention
- Fig. 4 is a schematic top plan view of the drum in Fig. 2;
- Fig. 5 is a side view of an embodiment of a strip, a plurality of which can be supported by the drum in Figs 2-3;
- Fig. 6 is a perspective view of an alternative embo ⁇ diment of the strip in Fig. 4;
- Fig. 7 is a perspective view of an alternative to a conventional drum.
- a belt conveyor of the type which the present inven- tion concerns can be used for conveying, for instance, foodstuffs into, through and out of a housing, in which the foodstuffs are treated, for instance frozen.
- the belt conveyor comprises in prior-art manner a drum 1, a conveyor belt 2 and a plura- lity of guide rollers 3 or the like.
- the drum 1 is rotat ⁇ ably mounted on a vertical centre shaft 4, and the con ⁇ veyor belt 2 follows along part of its length a helical path through several turns around the drum 1 and engages the outside thereof.
- the conveyor belt 2 follows a return path, which is determined by the guide rollers 3.
- the conveyor belt 2 can move either upwards or down ⁇ wards around the drum. It can be supported in various ways to be able to follow the helical path around the drum, as exemplified in Figs 2A-C.
- the belt 1 is of the self-supporting "type, i.e. each superjacent turn is supported by the sub ⁇ jacent turn, and merely the lowermost turn requires an external base in the form of e.g. rails 5, as illustrat- ed, or a trolley train or chains.
- the belt 1 is of the self-supporting type at its side facing the drum 1, but at its side fac- ing away from the drum 1, it is supported by a rail 6, which extends through all the turns of the belt 2 around the drum 1.
- the rail 6 is in turn supported by an exte ⁇ riorly positioned frame 7 having a plurality of rods 8.
- the rail 6 also supports the lowermost turn of the con ⁇ veyor belt 2.
- the belt 1 is supported by rails 6 both at its inner and its outer side.
- the rail 6 is at its inner side supported, via arms 9, by the exteriorly posi- tioned frame 7 with the rods 8.
- a drum 1 as shown in Figs 3 and 4 has a plurality of strips 10 around its outside, said strips 10 extending axially along the drum 1 and being arranged in grooves 11 so as to move axially relative to the drum 1.
- the grooves 11 may expand radially outwards, since the strips 10 can be kept in place by the conveyor belt 2 which is helically wound around the drum 1 in con ⁇ tact with the strips 10.
- Each strip 10 has at its lower end a rotatably mounted roller 12 which rests on a guide means 13.
- the guide means 13 extends around the drum 1 and supports all the strips 10 via the respective rollers 12.
- the guide means 13 Around the major part of the circumference of the drum 1, the guide means 13 has a pitch, which conforms with the pitch of the conveyor belt 2 along the helical path around the drum 1. Over a small angular area 14 around the shaft 4 of the drum 1, the guide means 13 bridges the pitch through one turn, such that the guide means 13 forms a closed path for the rollers 12.
- each strip 10 further has a supporting lug 15, which projects radially from the strip 10.
- the drum illustrated in Figs 3 and 4 thus is intended for a conveyor belt of the type as shown in Fig. 2A or Fig. 2B, i.e. a conveyor belt which is self-supporting at least on the side facing the drum 1.
- Fig. 5 shows one more embodiment of the strip 10 in Fig. 3. More specifically, the strip 10' shown in Fig. 5 has a plurality of lugs 16; one lug 16 for each turn of the conveyor belt 2 along the helical path.
- a drum 1 with a plurality of strips 10' according to Fig. 5 is thus intended for a conveyor belt 2, which is not self-sup ⁇ porting at its side facing the drum 1, whereas at its side facing away from the drum 1, it can either be self- supporting, as shown in Fig. 2A, or supported by a rail 6, as shown in Figs 2B and 2C.
- each lug 16 is, in the embodi ⁇ ment according to Fig. 5, foldable towards the strip 10', such that the lugs 16 are pressed inwards by the inside of the conveyor belt 2 in the successive pushing down of the respective strips 10' in the area 14.
- each lug 16 has more specifically the shape of a lever, which is pivotally mounted on a horizontal shaft, which essentially constitutes a tangent of the drum 1.
- Each lever has a projecting part 17 above the pivot shaft and a substantially perpendicular lower part 18 below the pivot shaft, said lower part 18 being biased against the strip 10' by means of a spring 19.
- the projecting upper parts 17 engage under the conveyor belt 1 at the side thereof facing the drum 1 in a plurality of points along each turn of the conveyor belt 2 around the drum 1.
- the guide means 13 or a corresponding guide means at the top of the drum 1 moves the strip 10' downwards a distance corresponding to the pitch of the conveyor belt 2 through one turn along the helical path around the drum 1.
- the projecting parts 17 of the lugs 16 will first move out of engagement with the respective turns of the conveyor belt 2 and then be pressed inwards against the strip 10' by the inner edge of the subjacent turn of the conveyor belt 2. After passing the associated subjacent turn, the projecting part 17 once more snaps out owing to the action of the spring 19 and will thus support the conveyor belt 2 in points one turn lower than before entering the angular area 14.
- Fig. 6 illustrates a further embodiment of the strip 10 in Figs 3 and 4.
- the strip 10" shown in Fig. 6 is at its upper end arranged to be on the one hand vertically displaceable, like the strips 10 and 10', and, on the other hand, to be pivotable about a horizontal shaft, which essentially is a tangent of the drum 1. This is accomplished by the strip 10" at its upper end having opposed pins 20, which engage in axial slots (not shown) in the upper part of the drum 1.
- the strip 10" has a roller 12, which is guided by a guide means (not shown).
- This guide means has the same appearance as the guide means 13 in Fig.
- the strip 10 further has a lug 15 for supporting the inside of the lower turn of a conveyor belt 2, which at its side facing the drum 1 is self-supporting.
- the strip 10 when passing the area 14, will perform with its lower end a movement inwards, downwards and again outwards, whereby the lug 15 disengages the underside of the conveyor belt 2 at the upper end of the lowermost turn and engages the underside of the lower end of the lowermost turn of the conveyor belt 2 around the drum 1.
- Fig. 7 illustrates two chains 21 and 22, which are adapted to support the strips 10, 10' directly and, thus, can be considered an alternative embodiment of the drum 1.
- Each chain 21, 22 is mounted to follow a path, which completely conforms with the guide means 13 outside the area 14. In this area, each chain 21, 22 is moved down ⁇ wards a distance which is essentially equal to the pitch of the conveyor belt 2 through one turn. This is accom ⁇ plished by means of four guide rollers 23-26 for each chain 21, 22.
- the chains are driven synchronously in some suitable fashion, and the strips 10, 10' are disengaged from the chains 21, 22 at the beginning of the area 14 and are again connected to the chains 21, 22 at the end of the area 14.
- one more guide means can be arrang ⁇ ed to positively guide the strip 10, 10', 10" downwards in the area 14.
- the entire strip 10" in Fig. 6 can be made to follow the movement pattern indicated by arrows, i.e. without pivoting about the pins 20.
- the strips 10, 10' can be supported by the chains 21, 22 only, or by means of rollers 12 and a guide means 13.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK97919847T DK0958208T3 (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
AU24186/97A AU709225B2 (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
JP9536126A JP2000508282A (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
EP97919847A EP0958208B1 (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
DE69726186T DE69726186T2 (en) | 1996-04-11 | 1997-04-10 | FÖRDERBAND |
CA002251088A CA2251088C (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
US09/166,562 US6062375A (en) | 1996-04-11 | 1998-10-06 | Endless conveyor belt mounted on a rotatable drum |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9601365A SE9601365L (en) | 1996-04-11 | 1996-04-11 | conveyor belt |
SE9601365-1 | 1996-04-11 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/166,562 Continuation US6062375A (en) | 1996-04-11 | 1998-10-06 | Endless conveyor belt mounted on a rotatable drum |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997037912A1 true WO1997037912A1 (en) | 1997-10-16 |
Family
ID=20402144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1997/000592 WO1997037912A1 (en) | 1996-04-11 | 1997-04-10 | Conveyor belt |
Country Status (11)
Country | Link |
---|---|
US (1) | US6062375A (en) |
EP (1) | EP0958208B1 (en) |
JP (1) | JP2000508282A (en) |
CN (1) | CN1094880C (en) |
AU (1) | AU709225B2 (en) |
CA (1) | CA2251088C (en) |
DE (1) | DE69726186T2 (en) |
DK (1) | DK0958208T3 (en) |
RU (1) | RU2161113C2 (en) |
SE (1) | SE9601365L (en) |
WO (1) | WO1997037912A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10120131C1 (en) * | 2001-04-25 | 2002-09-12 | Winand Wolf | Lining element used for a conveying path for conveying broken glass pieces in the glass-processing industry comprises a container divided into cells filled with broken glass pieces |
DE10117849A1 (en) * | 2001-04-06 | 2002-10-17 | Martin Herrmann | Spiral conveyor for continuous cooling/cooking of food stuffs has belt tensioner to maintain belt tension at level so that belt is driven only by drive force of drum turning drive |
CN100465558C (en) * | 2006-11-27 | 2009-03-04 | 南通冷冻设备有限公司 | Friction rotary drum of spiral freezing device |
WO2013142136A1 (en) * | 2012-03-21 | 2013-09-26 | Laitram, L.L.C. | Positive-drive spiral conveyor |
EP4234449A1 (en) * | 2015-07-24 | 2023-08-30 | Ashworth Bros., Inc. | Spiral conveyor system |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6360870B1 (en) * | 1999-11-22 | 2002-03-26 | Batching Systems, Inc. | Feeding and sorting apparatus |
CA2543106A1 (en) * | 2003-10-14 | 2005-04-28 | Larry Nelson | Self-stacking spiral conveyor with modular drive system |
US7347316B2 (en) * | 2003-10-21 | 2008-03-25 | Heber Gerald J | Spiral conveyor belt drive system |
DE202004017986U1 (en) * | 2004-11-19 | 2006-02-09 | Storcon Gmbh | Spiral conveyor for conveying goods comprises a support wall feeding a conveying chain with transport lamellae and aligned perpendicular to the roller axis of the conveyor chain |
DK2848560T3 (en) | 2010-07-12 | 2017-01-23 | Laitram Llc | Forced spiral conveyor. |
US10945858B2 (en) | 2010-09-03 | 2021-03-16 | Globus Medical, Inc. | Expandable interspinous process fixation device |
CN103277957A (en) * | 2013-06-06 | 2013-09-04 | 北京市京科伦冷冻设备有限公司 | Spiral refrigerating plant |
PL3294648T3 (en) * | 2015-05-08 | 2023-05-15 | Fps Food Process Solutions Corporation | Tapered drive bar apparatus |
EP3228564B1 (en) * | 2016-04-08 | 2021-01-20 | Ambaflex International B.V. | A helical conveyor and a conveying system |
US10947048B2 (en) | 2017-07-12 | 2021-03-16 | Habasit Ag | Positive drive for a spiral conveyor and belt module for a radius or spiral conveyor |
US20230124209A1 (en) * | 2021-10-15 | 2023-04-20 | Habasit Ag | Spiral conveyor and drum drive for spiral conveyor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU469393B2 (en) * | 1971-12-01 | 1976-02-12 | Stewart Systems Inc. | Endless helical conveyer and belt |
EP0293095A1 (en) * | 1987-05-09 | 1988-11-30 | Frigoscandia Food Process Systems Aktiebolag | Helical conveyor |
US4893708A (en) * | 1988-09-20 | 1990-01-16 | Northfield Equipment And Manufacturing Co., Inc. | Conveyor for freezing food packages |
EP0453670A1 (en) * | 1988-12-23 | 1991-10-30 | Frigoscandia Food Process Systems Aktiebolag | Conveyor |
US5460260A (en) * | 1994-06-22 | 1995-10-24 | York International Corporation | Helical conveyor |
WO1995035250A1 (en) * | 1994-06-21 | 1995-12-28 | Ashworth Bros., Inc. | Conveyor belt with asymmetric edge links |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3664487A (en) * | 1969-05-23 | 1972-05-23 | Carl H Ballenger | Endless helical conveyer and belt |
WO1991004208A1 (en) * | 1989-09-12 | 1991-04-04 | Ashworth Bros., Inc. | Stacking belt drive system |
US5247810A (en) * | 1992-07-14 | 1993-09-28 | Liquid Carbonic Corporation | Freezer conveyor |
-
1996
- 1996-04-11 SE SE9601365A patent/SE9601365L/en not_active IP Right Cessation
-
1997
- 1997-04-10 JP JP9536126A patent/JP2000508282A/en active Pending
- 1997-04-10 AU AU24186/97A patent/AU709225B2/en not_active Ceased
- 1997-04-10 CA CA002251088A patent/CA2251088C/en not_active Expired - Fee Related
- 1997-04-10 CN CN97193764A patent/CN1094880C/en not_active Expired - Fee Related
- 1997-04-10 RU RU98120604/03A patent/RU2161113C2/en not_active IP Right Cessation
- 1997-04-10 DE DE69726186T patent/DE69726186T2/en not_active Expired - Fee Related
- 1997-04-10 DK DK97919847T patent/DK0958208T3/en active
- 1997-04-10 WO PCT/SE1997/000592 patent/WO1997037912A1/en active IP Right Grant
- 1997-04-10 EP EP97919847A patent/EP0958208B1/en not_active Expired - Lifetime
-
1998
- 1998-10-06 US US09/166,562 patent/US6062375A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU469393B2 (en) * | 1971-12-01 | 1976-02-12 | Stewart Systems Inc. | Endless helical conveyer and belt |
EP0293095A1 (en) * | 1987-05-09 | 1988-11-30 | Frigoscandia Food Process Systems Aktiebolag | Helical conveyor |
US4893708A (en) * | 1988-09-20 | 1990-01-16 | Northfield Equipment And Manufacturing Co., Inc. | Conveyor for freezing food packages |
EP0453670A1 (en) * | 1988-12-23 | 1991-10-30 | Frigoscandia Food Process Systems Aktiebolag | Conveyor |
WO1995035250A1 (en) * | 1994-06-21 | 1995-12-28 | Ashworth Bros., Inc. | Conveyor belt with asymmetric edge links |
US5460260A (en) * | 1994-06-22 | 1995-10-24 | York International Corporation | Helical conveyor |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10117849A1 (en) * | 2001-04-06 | 2002-10-17 | Martin Herrmann | Spiral conveyor for continuous cooling/cooking of food stuffs has belt tensioner to maintain belt tension at level so that belt is driven only by drive force of drum turning drive |
DE10117849C2 (en) * | 2001-04-06 | 2003-04-17 | Martin Herrmann | Spiral conveyor system |
DE10120131C1 (en) * | 2001-04-25 | 2002-09-12 | Winand Wolf | Lining element used for a conveying path for conveying broken glass pieces in the glass-processing industry comprises a container divided into cells filled with broken glass pieces |
CN100465558C (en) * | 2006-11-27 | 2009-03-04 | 南通冷冻设备有限公司 | Friction rotary drum of spiral freezing device |
WO2013142136A1 (en) * | 2012-03-21 | 2013-09-26 | Laitram, L.L.C. | Positive-drive spiral conveyor |
EP2828184A4 (en) * | 2012-03-21 | 2016-03-23 | Laitram Llc | Positive-drive spiral conveyor |
EP4234449A1 (en) * | 2015-07-24 | 2023-08-30 | Ashworth Bros., Inc. | Spiral conveyor system |
US12054342B2 (en) | 2015-07-24 | 2024-08-06 | Ashworth Bros., Inc. | Spiral conveyor system |
Also Published As
Publication number | Publication date |
---|---|
CN1094880C (en) | 2002-11-27 |
US6062375A (en) | 2000-05-16 |
DK0958208T3 (en) | 2004-01-05 |
CA2251088A1 (en) | 1997-10-16 |
DE69726186D1 (en) | 2003-12-18 |
AU709225B2 (en) | 1999-08-26 |
SE504530C2 (en) | 1997-03-03 |
SE9601365L (en) | 1997-03-03 |
DE69726186T2 (en) | 2004-04-15 |
CA2251088C (en) | 2004-08-17 |
JP2000508282A (en) | 2000-07-04 |
AU2418697A (en) | 1997-10-29 |
RU2161113C2 (en) | 2000-12-27 |
CN1216027A (en) | 1999-05-05 |
EP0958208A1 (en) | 1999-11-24 |
EP0958208B1 (en) | 2003-11-12 |
SE9601365D0 (en) | 1996-04-11 |
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